Piston connection.



ein sar ps'roiv oonlvnorron. i

massen.

ibility and an even distribution of pressure,

as well as to enable the piston to properly aline itself with the direction of thrust and effect an even wear, on the piston, piston rings and cylinder.

ln carrying out my invention a ball and .socket connection is established between the drive rod and driven element, and for the purpose use is made of a novel arrangement of clamp plates presenting a socket associated with the piston or other driven element, and a novel arrangement of bolts to clamp the socket plates to the driven element and to a ball provided on the piston rod or like drive rod.

Reference is to'be had to the accompany-v ing drawings forming a part of this specitication in which similar reference characters indicate corresponding parts in all the views, it being understood that the drawings are merely illustrative o'f one example of the invention.

Figure 1 is a longitudinal sectional View of a piston and piston rod having my improved connection;

Fig. 2 is a transverse section on the line 2-2, Fig. l;

Fig. 3 is a rear face View of a sectionalY plate forming a part of the connecting means;

Fig. 4.- is a partly sectional side elevation of the piston and the partially assembled clamp plates associated therewith' and their securing bolts;

Fig. 5 is a detail View of a detachable ball for the drive rod and means for securing the same in position on the drive rod shown in aart.

1 The numeral 10 indicates a trunk piston of an internal combustion engine Aand 15 the piston rod. 1n carrying out my inven- Lion 1 apply tothe rear face of the head 11 Speccation'of Letters Patent.

Patented Nov. 12, 1918.

Application filed December 11, 1917. Serial No. 206,687.

of the piston, a plate l2 associated with which is a plate designated generally by the `numeral 13 which is formed in two sections by dividing the plate centrally as'best seen in Figs. 2 and Q. On the piston rod 15 I providev a ball head 14a which may be integralwith said rod or separate therefrom asshown in Fig. 5 and designated 14a.

The' plates 13,12 are formed with alined bolt holes 17, 18 which receive clamp bolts 16. Each bolt is double-ended, the forward end of the bolt projecting through and beyond the plate 12 and being threaded and engaging a threaded hole l5) in the piston head 11 or other driven element. On each bolt between the ends thereof 1s provided means to receive a wrench and to provide a shoulder to bear plate 12 which plate is placedA directly against-the piston head l1. In the form shown a polygonal enlargement 2O is provided on the bolt for taking the wrench and to present a forward shoulder which bears against the plate 1:2 at the bottom of a depression 21 in said plate.` which accommodates the said enlargen'icnt. The rear ends of the bolts 1G extend rearwardly beyond thc sections of the plate 13 and are threaded to receive nuts 22; The nuts are ot' the type -tobe locked by a Cotter pin for which purpose the bolts have transverse pin holes Q3 and thc usual slots or recesses 24 are produced in the nut to receive a cotter pin (not shown). Any other approved means may be provided to lock the nut as will be readily understood.

The plates 12, 13 present a socket to re-V ceive the ball 14 01114 for which purpose a concave depression formed in the rear face of the plate l2 and an opposed concave depression 26 is produced in the plate 13. A throat 27 leads through the plate 13 to the depression 26 and is flared to acconnnodate the varied positions of piston rod 15. The plate 13, being divided in the centen/divides the depression 26 and throat 27 so that the said depression in the assembled sections will be presented in proper relation to the depression 25 of the socket and to the ball 14.

'The described construction establishes a flexible connectionbetween the 'piston and rod, enabling the piston to acconnnodate it-`n self to the direction of pressure, and equalizes the Wear on the parts.

To detaohably secure the head 1l to the piston rod 15a as in Fig. -5,isaid rod has a against the rear side of the i 

